Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 23ac1ddc3c301598b69018b72c49de9a02804b8d3c388aaea1a71b3aea8c84ed:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^